A new study published in Communications Earth & Environment has reconstructed the climate conditions of the ancient Indus River Valley civilization between 3000 and 1000 B.C., finding that four intense droughts -- each lasting more than 85 years -- likely drove the gradual decline of one of the world's earliest advanced societies.

The research team, led by Hiren Solanki at the Indian Institute of Technology, Gandhinagar, combined paleoclimate data from cave formations and lake records with computer models to determine that the region shifted from wetter-than-present monsoon conditions to prolonged dry spells as the tropical Pacific Ocean warmed. The third drought, peaking around 1733 B.C., proved the most severe: it lasted 164 years, reduced annual rainfall by 13%, and affected nearly the entire region.

Overall temperatures rose by 0.5 degrees Celsius and rainfall dropped between 10 and 20%. These changes shrank lakes and rivers, dried soils, and made agriculture increasingly difficult in areas away from major waterways. Harappan settlements progressively relocated eastward toward the Indus River over roughly 2,000 years. The civilization's long survival under repeated climate stress -- through crop switching, trade diversification, and settlement relocation -- offers lessons for modern communities facing environmental pressures, the researchers said.

Australia warned it's in danger of missing its 2035 climate targets without deeper pollution cuts, which in turn threatens the nation's ambitions to reach net zero by mid-century. From a report: Emissions are set to fall 48% by 2035 from 2005 levels based on current projections [non-paywalled source], the government said in a report on Thursday. That's short of an official pledge to cut greenhouse gases between 62% and 70%. The forecast doesn't take into account new action planned under the nation's Net Zero Plan. Still, the targets remain achievable and officials plan to take additional measures to meet them, Minister for Climate Change and Energy Chris Bowen said in a speech to parliament.

Researchers at the Pacific Institute documented 420 water-related conflicts globally in 2024, a record that far surpasses the 355 incidents logged in 2023 and continues a trend that has seen such violence more than quadruple over the past five years. The Oakland-based water think tank's database tracks disputes where water triggered violence, where water systems were targeted, and where infrastructure became collateral damage in broader conflicts.

The Middle East reported the most incidents at 138, including 66 tied to the Israeli-Palestinian conflict. The Israeli military destroyed more than 30 wells in Rafah and Khan Yunis, and there were numerous reports of settlers destroying pipelines and tanks in the West Bank. The Russia-Ukraine war accounted for 51 incidents, including strikes that disrupted water service in Ukrainian cities.

Canada's Prime Minister Mark Carney has signed an agreement with Alberta's premier that will roll back certain climate rules to spur investment in energy production, while encouraging construction of a new oil pipeline to the West Coast. From a report: Under the agreement, which was signed on Thursday, the federal government will scrap a planned emissions cap on the oil and gas sector and drop rules on clean electricity in exchange for a commitment by Canada's top oil-producing province to strengthen industrial carbon pricing and support a carbon capture-and-storage project.

The deal, which was hailed by the country's oil industry but panned by environmentalists, signaled a shift in Canada's energy policy in favour of fossil fuel development and is already creating tensions within Carney's minority government. Steven Guilbeault, who served as environment minister under Carney's predecessor Justin Trudeau, said he was quitting the cabinet over concerns that Canada's climate plan was being dismantled.

An anonymous reader quotes a report from the Associated Press: Mexico unveiled plans Wednesday to build what it claims will be Latin America's most powerful supercomputer -- a project the government says will help the country capitalize on the rapidly evolving uses of artificial intelligence and exponentially expand the country's computing capacity. Dubbed "Coatlicue" for the Mexica goddess considered the earth mother, the supercomputer would be seven times more powerful than the region's current leader in Brazil, Jose Merino, head of the Telecommunications and Digital Transformation Agency.

President Claudia Sheinbaum said during her morning news briefing that the location for the project had not been decided yet, but construction will begin next year. "We're very excited," said Sheinbaum, an academic and climate scientist. "It is going to allow Mexico to fully get in on the use of artificial intelligence and the processing of data that today we don't have the capacity to do." Merino said that Mexico's most powerful supercomputer operates at 2.3 petaflops -- a unit to measure computing speed, meaning it can perform one quadrillion operations per second. Coatlicue would have a capacity of 314 petaflops.

European manufacturers are facing a two-front assault from China that has German industry associations warning of deindustrialisation: on one side, artificially cheap Chinese goods are flooding into Europe, and on the other, Beijing has demonstrated its willingness to abruptly cut off access to critical inputs like rare earths and semiconductors.

The alarm intensified in October when China added five rare earths to its export-licensing regime and then banned exports of computer chips made by Nexperia, a Dutch-headquartered but Chinese-owned chipmaker that supplies numerous European carmakers, according to The Economist.

Several European firms warned of production stoppages, and some German companies put workers on leave without pay. Germany's trade deficit with China hit $76.52 billion last year and is expected to surge to around $100.87 billion this year, The Economist reported, driven by collapsing German exports and a rush of imports in categories like cars, chemicals, and machinery that were once German specialties. Chinese brands now account for 20% of Europe's hybrid market and 11% of electric vehicle sales. German cars command just 17% of the Chinese market, down from 27% in 2020.

The rare earth controls were suspended for a year after the US and China struck a trade deal on October 30th, but the EU found itself a bystander to negotiations that directly affected its economy. Writing in the Financial Times, Robin Harding argues that China's explicit goal of self-sufficiency leaves Europe with few options. "There is nothing that China wants to import, nothing it does not believe it can make better and cheaper," he wrote, concluding that large-scale protectionism may be unavoidable if Europe wants to retain any industry at all.

An anonymous reader shares a report: It is shocking but not surprising. Lightning crackles on Mars, scientists reported on Wednesday. What they observed, however, were not jagged, high-voltage bolts like those on Earth, arcing thousands of feet from cloud to ground. Rather, the phenomenon was more like the shock you feel when you scuff your feet on the carpet on a cold winter morning and then touch a metal doorknob.

"This is like mini-lightning on Mars," Baptiste Chide, a scientist at the Research Institute in Astrophysics and Planetary Science in Toulouse, France, said of the centimeter-scale electrical discharges. Dr. Chide and his colleagues reported the findings in a paper published on Wednesday in the journal Nature. The electrical sparks, although not as dramatically violent as on Earth, could play an important role in chemical reactions in the Martian atmosphere.

Malaysia's Johor, one of Southeast Asia's fastest-growing data center hubs, has announced it will no longer approve applications for Tier 1 and Tier 2 data centers because of their enormous water consumption -- up to 50 million liters daily, or roughly 200 times what higher-tier facilities require.

The Malaysian state has approved 51 data center projects as of November 2025. 17 centers are already operational, 11 are under construction and 23 received approval this year. The announcement follows concerns raised by a local politician who pointed to water supply disruptions in Georgia in the US after a data center began operations and protests in Uruguay over fears that data centers could affect farms.

China launched an uncrewed Shenzhou 22 spacecraft to serve as an emergency lifeboat for three astronauts aboard the Tiangong space station after a docked return craft was found to have a cracked window likely caused by space debris. "A Long March 2F rocket fired its engines and lifted off with the Shenzhou 22 spacecraft, carrying cargo instead of a crew, at 11:11 pm EST Monday (04:11 UTC Tuesday)," reports Ars Technica. "The spacecraft docked with the Tiangong station nearly 250 miles (400 kilometers) above the Earth about three-and-a-half hours later." From the report: Chinese engineers worked fast to move up the launch of the Shenzhou 22, originally set to fly next year. On November 4, astronauts discovered one of the two crew ferry ships docked to the Tiangong station had a damaged window, likely from an impact with a small fragment of space junk. [...] Now, 20 days after the saga began, the Tiangong outpost again has a lifeboat for its long-term residents. Astronauts Zhang Lu, Fu Wei, and Zhang Hongzhang will return to Earth on the Shenzhou 22 spacecraft next year, soon after the arrival of their three replacements.

The Tiangong astronauts will head outside the station on a spacewalk to inspect the damaged window on Shenzhou 20. Eventually, Shenzhou 20 will depart Tiangong and reenter the atmosphere with cargo. Assuming a smooth landing, Chinese engineers will have an opportunity to get a closer look at the damage on the ground to inform the design of future spacecraft. A preliminary assessment of the window indicates the crack is in the outermost layer of heat-insulating glass in Shenzhou 20's porthole window, according to Chinese state media. Engineers on the ground conducted simulations and wind tunnel ablation tests to determine whether the window might fail during reentry. "The results showed that the cracks would still propagate further," reported CCTV, China's government-run television network. "We held review meeting, and everyone agreed that ensuring the safe return of the astronauts was too risky with the glass damaged," Zhou said.

While this crew is just one month into their planned six-month expedition, an emergency could force them to leave the station and return home at any time. Although remote, another collision with space junk, a major systems failure, or a medical emergency involving one of the astronauts could trigger an evacuation. That's why Chinese officials wanted to quickly launch Shenzhou 22 to give the crew a ticket home.The International Space Station follows the same policy, with SpaceX's Dragon spacecraft and Russian Soyuz ships serving as lifeboats until their crews' scheduled return to Earth.

schwit1 writes: Indonesia's capital, Jakarta, tops a ranking that is increasingly dominated by Asia: the world's most populated city. It edged out Bangladesh's capital, Dhaka, and Japan's Tokyo to earn the title in a new United Nations report. [PDF]

With an estimated population of nearly 42 million residents, Jakarta soared from 33rd place in the previous rankings, in 2018, that were topped by Tokyo. It's followed by Dhaka, with 36 million, which the report says is "expected to become the world's largest city by mid-century."

Scientists report that the Antarctic ozone hole in 2025 is the fifth-smallest since 1992, thanks largely to decades of global restrictions on ozone-depleting chemicals under the Montreal Protocol. ABC News reports: The ozone hole reached its greatest one-day extent for 2025 in early September, measuring 8.83 million square miles, about 30% smaller than the largest hole on record in 2006. NOAA and NASA scientists emphasize that recent findings show efforts to limit ozone-depleting chemical compounds can have a significant impact. The regulations are established by the Montreal Protocol, which went into effect in 1992. Subsequent amendments are driving the gradual recovery of the ozone layer, which remains on track to fully recover later this century as countries worldwide replace harmful substances with safer alternatives.

For decades, chlorofluorocarbons (CFCs) and other ozone-depleting compounds were widely used in aerosol sprays, foams, air conditioners and refrigerators, causing significant reductions in ozone levels. Natural factors, such as temperature and atmospheric circulation, also influence ozone concentrations and are likely to have contributed to a smaller ozone hole this year, according to researchers. "This year's hole would have been more than one million square miles larger if there was still as much chlorine in the stratosphere as there was 25 years ago," said Paul Newman, a senior scientist at the University of Maryland system and longtime leader of NASA's ozone research team.

Theia crashed into earth and formed the moon, the theory goes. But then where did Theia come from? The lead author on a new study says "The most convincing scenario is that most of the building blocks of Earth and Theia originated in the inner Solar System. Earth and Theia are likely to have been neighbors."

Though Theia was completely destroyed in the collision, scientists from the Max Planck Institute for Solar System Research led a team that was able to measure the ratio of tell-tale isotopes in Earth and Moon rocks, Euronews explains: The research team used rocks collected on Earth and samples brought back from the lunar surface by Apollo astronauts to examine their isotopes. These isotopes act like chemical fingerprints. Scientists already knew that Earth and Moon rocks are almost identical in their metal isotope ratios. That similarity, however, has made it hard to learn much about Theia, because it has been difficult to separate material from early Earth and material from the impactor.

The new research attempts a kind of planetary reverse engineering. By examining isotopes of iron, chromium, zirconium and molybdenum, the team modelled hundreds of possible scenarios for the early Earth and Theia, testing which combinations could produce the isotope signatures seen today. Because materials closer to the Sun formed under different temperatures and conditions than those further out, those isotopes exist in slightly different patterns in different regions of the Solar System.

By comparing these patterns, researchers concluded that Theia most likely originated in the inner Solar System, even closer to the Sun than the early Earth.
The team published their findings in the journal Science. Its title? "The Moon-forming impactor Theia originated from the inner Solar System."

"On the slopes of an Oregon volcano, engineers are building the hottest geothermal power plant on Earth," reports the Washington Post: The plant will tap into the infernal energy of Newberry Volcano, "one of the largest and most hazardous active volcanoes in the United States," according to the U.S. Geological Survey. It has already reached temperatures of 629 degrees Fahrenheit, making it one of the hottest geothermal sites in the world, and next year it will start selling electricity to nearby homes and businesses. But the start-up behind the project, Mazama Energy, wants to crank the temperature even higher — north of 750 degrees — and become the first to make electricity from what industry insiders call "superhot rock." Enthusiasts say that could usher in a new era of geothermal power, transforming the always-on clean energy source from a minor player to a major force in the world's electricity systems.

"Geothermal has been mostly inconsequential," said Vinod Khosla, a venture capitalist and one of Mazama Energy's biggest financial backers. "To do consequential geothermal that matters at the scale of tens or hundreds of gigawatts for the country, and many times that globally, you really need to solve these high temperatures." Today, geothermal produces less than 1 percent of the world's electricity. But tapping into superhot rock, along with other technological advances, could boost that share to 8 percent by 2050, according to the International Energy Agency (IEA). Geothermal using superhot temperatures could theoretically generate 150 times more electricity than the world uses, according to the IEA. "We believe this is the most direct path to driving down the cost of geothermal and making it possible across the globe," said Terra Rogers, program director for superhot rock geothermal at the Clean Air Task Force, an environmentalist think tank. "The [technological] gaps are within reason. These are engineering iterations, not breakthroughs."

The Newberry Volcano project combines two big trends that could make geothermal energy cheaper and more widely available. First, Mazama Energy is bringing its own water to the volcano, using a method called "enhanced geothermal energy"... [O]ver the past few decades, pioneering projects have started to make energy from hot dry rocks by cracking the stone and pumping in water to make steam, borrowing fracking techniques developed by the oil and gas industry... The Newberry project also taps into hotter rock than any previous enhanced geothermal project. But even Newberry's 629 degrees fall short of the superhot threshold of 705 degrees or above. At that temperature, and under a lot of pressure, water becomes "supercritical" and starts acting like something between a liquid and a gas. Supercritical water holds lots of heat like a liquid, but it flows with the ease of a gas — combining the best of both worlds for generating electricity... [Sriram Vasantharajan, Mazama's CEO] said Mazama will dig new wells to reach temperatures above 750 degrees next year. Alongside an active volcano, the company expects to hit that temperature less than three miles beneath the surface. But elsewhere, geothermal developers might have to dig as deep as 12 miles.
While Mazama plans to generate 15 megawatts of electricity next year, it hopes to eventually increase that to 200 megawatts. (And the company's CEO said it could theoretically generate five gigawatts of power.)

But more importantly, successful projects "motivate other players to get into the market," according to a senior geothermal research analyst at energy consultancy Wood Mackenzie, who predicted "a ripple effect," to the Washington Post where "we'll start seeing more companies get the financial support to kick off their own pilots."

In a 2023 pitch to investors, a "well-financed, highly credentialed" startup named Stardust aimed for a "gradual temperature reduction demonstration" in 2027, according to a massive new 9,600-word article from Politico. ("Annually dispersing ~1 million tons of sun-reflecting particles," says one slide. "Equivalent to ~1% extra cloud coverage.")

"Another page told potential investors Stardust had already run low-altitude experiments using 'test particles'," the article notes: [P]ublic records and interviews with more than three dozen scientists, investors, legal experts and others familiar with the company reveal an organization advancing rapidly to the brink of being able to press "go" on its planet-cooling plans. Meanwhile, Stardust is seeking U.S. government contracts and quietly building an influence machine in Washington to lobby lawmakers and officials in the Trump administration on the need for a regulatory framework that it says is necessary to gain public approval for full-scale deployment....

The presentation also included revenue projections and a series of opportunities for venture capitalists to recoup their investments. Stardust planned to sign "government contracts," said a slide with the company's logo next to an American flag, and consider a "potential acquisition" by 2028. By 2030, the deck foresaw a "large-scale demonstration" of Stardust's system. At that point, the company claimed it would already be bringing in $200 million per year from its government contracts and eyeing an initial public offering, if it hadn't been sold already.
The article notes that for "a widening circle of researchers and government officials, Stardust's perceived failures to be transparent about its work and technology have triggered a larger conversation about what kind of international governance framework will be needed to regulate a new generation of climate technologies." (Since currently Stardust and its backers "have no legal obligations to adhere to strenuous safety principles or to submit themselves to the public view.")

In October Politico spoke to Stardust CEO, Yanai Yedvab, a former nuclear physicist who was once deputy chief scientist at the Israeli Atomic Energy Commission. Stardust "was ready to announce the $60 million it had raised from 13 new investors," the article points out, "far larger than any previous investment in solar geoengineering." [Yedvab] was delighted, he said, not by the money, but what it meant for the project. "We are, like, few years away from having the technology ready to a level that decisions can be taken" — meaning that deployment was still on track to potentially begin on the timeline laid out in the 2023 pitch deck. The money raised was enough to start "outdoor contained experiments" as soon as April, Yedvab said. These would test how their particles performed inside a plane flying at stratospheric heights, some 11 miles above the Earth's surface... The key thing, he insisted, was the particle was "safe." It would not damage the ozone layer and, when the particles fall back to Earth, they could be absorbed back into the biosphere, he said. Though it's impossible to know this is true until the company releases its formula. Yedvab said this round of testing would make Stardust's technology ready to begin a staged process of full-scale, global deployment before the decade is over — as long as the company can secure a government client. To start, they would only try to stabilize global temperatures — in other words fly enough particles into the sky to counteract the steady rise in greenhouse gas levels — which would initially take a fleet of 100 planes.
This begs the question: should the world attempt solar geoengineering? That the global temperature would drop is not in question. Britain's Royal Society... said in a report issued in early November that there was little doubt it would be effective. They did not endorse its use, but said that, given the growing interest in this field, there was good reason to be better informed about the side effects... [T]hat doesn't mean it can't have broad benefits when weighed against deleterious climate change, according to Ben Kravitz, a professor of earth and atmospheric sciences at Indiana University who has closely studied the potential effects of solar geoengineering. "There would be some winners and some losers. But in general, some amount of ... stratospheric aerosol injection would likely benefit a whole lot of people, probably most people," he said. Other scientists are far more cautious. The Royal Society report listed a range of potential negative side effects that climate models had displayed, including drought in sub-Saharan Africa. In accompanying documents, it also warned of more intense hurricanes in the North Atlantic and winter droughts in the Mediterranean. But the picture remains partial, meaning there is no way yet to have an informed debate over how useful or not solar geoengineering could be...

And then there's the problem of trying to stop. Because an abrupt end to geoengineering, with all the carbon still in the atmosphere, would cause the temperature to soar suddenly upward with unknown, but likely disastrous, effects... Once the technology is deployed, the entire world would be dependent on it for however long it takes to reduce the trillion or more tons of excess carbon dioxide in the atmosphere to a safe level...

Stardust claims to have solved many technical and safety challenges, especially related to the environmental impacts of the particle, which they say would not harm nature or people. But researchers say the company's current lack of transparency makes it impossible to trust.
Thanks to long-time Slashdot reader fjo3 for sharing the article.

An anonymous reader shared this report from CNN: The universe's expansion might not be accelerating but slowing down, a new study suggests. If confirmed, the finding would upend decades of established astronomical assumptions and rewrite our understanding of dark energy, the elusive force that counters the inward pull of gravity in our universe...

Last year, a consortium of hundreds of researchers using data from the Dark Energy Spectroscopic Instrument (DESI) in Arizona, developed the largest ever 3D map of the universe. The observations hinted at the fact that dark energy may be weakening over time, indicating that the universe's rate of expansion could eventually slow. Now, a study published November 6 in the journal Monthly Notices of the Royal Astronomical Society provides further evidence that dark energy might not be pushing on the universe with the same strength it used to. The DESI project's findings last year represented "a major, major paradigm change ... and our result, in some sense, agrees well with that," said Young-Wook Lee, a professor of astrophysics at Yonsei University in South Korea and lead researcher for the new study....

To reach their conclusions, the researchers analyzed a sample of 300 galaxies containing Type 1a supernovas and posited that the dimming of distant exploding stars was not only due to their moving farther away from Earth, but also due to the progenitor star's age... [Study coauthor Junhyuk Son, a doctoral candidate of astronomy at Yonsei University, said] "we found that their luminosity actually depends on the age of the stars that produce them — younger progenitors yield slightly dimmer supernovae, while older ones are brighter." Son said the team has a high statistical confidence — 99.99% — about this age-brightness relation, allowing them to use Type 1a supernovas more accurately than before to assess the universe's expansion... Eventually, if the expansion continues to slow down, the universe could begin to contract, ending in what astronomers imagine may be the opposite of the big bang — the big crunch. "That is certainly a possibility," Lee said. "Even two years ago, the Big Crunch was out of the question. But we need more work to see whether it could actually happen."

The new research proposes a radical revision of accepted knowledge, so, understandably, it is being met with skepticism. "This study rests on a flawed premise," Adam Riess, a professor of physics and astronomy at the Johns Hopkins University and one of the recipients of the 2011 Nobel Prize in physics, said in an email. "It suggests supernovae have aged with the Universe, yet observations show the opposite — today's supernovae occur where young stars form. The same idea was proposed years ago and refuted then, and there appears to be nothing new in this version." Lee, however, said Riess' claim is incorrect. "Even in the present-day Universe, Type Ia supernovae are found just as frequently in old, quiescent elliptical galaxies as in young, star-forming ones — which clearly shows that this comment is mistaken. The so-called paper that 'refuted' our earlier result relied on deeply flawed data with enormous uncertainties," he said, adding that the age-brightness correlation has been independently confirmed by two separate teams in the United States and China... "Extraordinary claims require extraordinary evidence," Dragan Huterer, a professor of physics at the University of Michigan in Ann Arbor, said in an email, noting that he does not feel the new research "rises to the threshold to overturn the currently favored model...."

The new Vera C. Rubin Observatory, which started operating this year, is set to help settle the debate with the early 2026 launch of the Legacy Survey of Space and Time, an ultrawide and ultra-high-definition time-lapse record of the universe made by scanning the entire sky every few nights over 10 years to capture a compilation of asteroids and comets, exploding stars, and distant galaxies as they change.

An anonymous reader shared this report from Sky News: A new wind record has been set for Britain, with enough electricity generated from turbines to power 22 million homes, the system operator has said.

The mark of 22,711 megawatts (MW) was set at 7.30pm on 11 November... enough to keep around three-quarters of British homes powered, the National Energy System Operator (Neso) said. The country had experienced windy conditions, particularly in the north of England and Scotland...

Neso has predicted that Britain could hit another milestone in the months ahead by running the electricity grid for a period entirely with zero carbon power, renewables and nuclear... Neso said wind power is now the largest source of electricity generation for the UK, and the government wants to generate almost all of the UK's electricity from low-carbon sources by 2030.
"Wind accounted for 55.7 per cent of Britain's electricity mix at the time..." reports The Times: Gas provided only 12.5 per cent of the mix, with 11.3 per cent coming from imports over subsea power cables, 8 per cent from nuclear reactors, 8 per cent from biomass plants, 1.4 per cent from hydroelectric plants and 1.1 per cent from storage.

Britain has about 32 gigawatts of wind farms installed, approximately half of that onshore and half offshore, according to the Wind Energy Database from the wind industry body Renewable UK. That includes five of the world's biggest offshore wind farms. The government is seeking to double onshore wind and quadruple offshore wind power by 2030 as part of its plan for clean energy....

Jane Cooper, deputy chief executive of Renewable UK, said: "On a cold, dark November evening, wind was generating enough electricity to power 80 per cent of British homes when we needed it most.

An anonymous reader quotes a report from Scientific American: Amid a deepening ecological crisis and acute water shortage, Tehran can no longer remain the capital of Iran, the country's president has said. The situation in Tehran is the result of "a perfect storm of climate change and corruption," says Michael Rubin, a political analyst at the American Enterprise Institute. "We no longer have a choice," said Iranian president Masoud Pezeshkian during a speech on Thursday. Instead Iranian officials are considering moving the capital to the country's southern coast. But experts say the proposal does not change the reality for the nearly 10 million people who live in Tehran and are now suffering the consequences of a decades-long decline in water supply. Iran's capital has moved many times over the centuries, notes the report. "But this marks the first time the Iranian government has moved the capital because of an ecological catastrophe." Yet, Rubin says, "it would be a mistake to look at this only through the lens of climate change" and not factor in the water, land, and wastewater mismanagement and corruption that have made the crisis worse.

Linda Shi, a social scientist and urban planner at Cornell University, says: "Climate change is not the thing that is causing it, but it is a convenient factor to blame in order to avoid taking responsibility" for poor political decisions.

alternative_right shares a report from Phys.org: Inspired by moss's resilience, researchers sent moss sporophytes -- reproductive structures that encase spores -- to the most extreme environment yet: space. Their results, published in the journal iScience on November 20, show that more than 80% of the spores survived nine months outside of the International Space Station (ISS) and made it back to Earth still capable of reproducing, demonstrating for the first time that an early land plant can survive long-term exposure to the elements of space.

[Lead author Tomomichi Fujita of Hokkaido University and his team] subjected Physcomitrium patens, a well-studied moss commonly known as spreading earthmoss, to a simulated a space environment, including high levels of UV radiation, extreme high and low temperatures, and vacuum conditions. They tested three different structures from the moss -- protenemata, or juvenile moss; brood cells, or specialized stem cells that emerge under stress conditions; and sporophytes, or encapsulated spores -- to find out which had the best chance of surviving in space.

The researchers found that UV radiation was the toughest element to survive, and the sporophytes were by far the most resilient of the three moss parts. None of the juvenile moss survived high UV levels or extreme temperatures. The brood cells had a higher rate of survival, but the encased spores exhibited ~1,000x more tolerance to UV radiation. The spores were also able to survive and germinate after being exposed to 196C for over a week, as well as after living in 55C heat for a month.

Authorities in Iran have sprayed clouds with chemicals to induce rain, in an attempt to combat the country's worst drought in decades. From a report: Known as cloud-seeding, the process was conducted over the Urmia lake basin on Saturday, Iran's official news agency Irna reported. Urmia is Iran's largest lake, but has largely dried out leaving a vast salt bed. Further operations will be carried out in east and west Azerbaijan, the agency said.

Rainfall is at record lows and reservoirs are nearly empty. Last week President Masoud Pezeshkian warned that if there is not enough rainfall soon, Tehran's water supply could be rationed and people may be evacuated from the capital. Cloud seeding involves injecting chemical salts including silver or potassium iodide into clouds via aircraft or through generators on the ground. Water vapour can then condense more easily and turn into rain. The technique has been around for decades, and the UAE has used it in recent years to help address water shortages. Iran's meteorological organisation said rainfall had decreased by about 89% this year compared with the long-term average, Irna reported.

"To be clear, the current economics of space-based data centers don't make sense," writes the Wall Street Journal.

"But they could in the future, perhaps as soon as a decade or so from now, according to an analysis by Phil Metzger, a research professor at the University of Central Florida and formerly of the National Aeronautics and Space Administration." "Space enthusiasts (comme moi) have long sought a business case to enable human migration beyond our home world," he posted on X amid the new hype. "I think AI servers in space is the first real business case that will lead to many more...."

The argument essentially boils down to the belief that AI's needs are eventually going to grow so great that we need to move to outer space. There the sun's power can be more efficiently harvested. In space, the sun's rays can be direct and constant for solar panels to collect — no clouds, no rainstorms, no nighttime. Demands for cooling could also be cut because of the vacuum of space. Plus, there aren't those pesky regulations that executives like to complain about, slowing construction of new power plants to meet the data-center needs. In space, no one can hear the Nimbys scream. "We will be able to beat the cost of terrestrial data centers in space in the next couple of decades," Bezos said at a tech conference last month. "Space will end up being one of the places that keeps making Earth better."

It's still early days. At Alphabet, Google's plans sound almost conservative. The search-engine company in recent days announced Project Suncatcher, which it describes as a moonshot project to scale machine learning in space. It plans to launch two prototype satellites by early 2027 to test its hardware in orbit. "Like any moonshot, it's going to require us to solve a lot of complex engineering challenges," Pichai posted on social media. Nvidia, too, has announced a partnership with startup Starcloud to work on space-based data centers. Not to be outdone, Elon Musk has been painting his own updated vision for the heavens... in recent weeks he has been talking more about how he can use his spaceships to deploy new versions of his solar-powered Starlink satellites equipped with high-speed lasers to build out in-space data centers.

On Friday, Musk further reiterated how those AI satellites would be able to generate 100 gigawatts of annual solar power — or, what he said, would be roughly a quarter of what the U.S. consumes on average in a year. "We have a plan mapped out to do it," he told investor Ron Baron during an event. "It gets crazy." Previously, he has suggested he was four to five years away from that ability. He's also touted even wilder ideas, saying on X that 100 terawatts a year "is possible from a lunar base producing solar-powered AI satellites locally and accelerating them to escape velocity with a mass driver." Simply put, he's suggesting a moon base will crank out satellites and throw them into orbit with a catapult. And those satellites' solar panels would generate 100,000 gigawatts a year. "I think we'll see intelligence continue to scale all the way up to where...most of the power of the sun is harnessed for compute," Musk told a tech conference in September.